/* * Copyright (c) 2002, 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */#ifndef SHARE_VM_GC_SHARED_ISGCACTIVEMARK_HPP#define SHARE_VM_GC_SHARED_ISGCACTIVEMARK_HPP#include "gc/shared/collectedHeap.hpp"#include "memory/allocation.hpp"#include "memory/universe.hpp"#include "utilities/debug.hpp"// This class provides a method for block structured setting of the// _is_gc_active state without requiring accessors in CollectedHeapclass IsGCActiveMark : public StackObj { public: IsGCActiveMark() { CollectedHeap* heap = Universe::heap(); assert(!heap->is_gc_active(), "Not reentrant"); heap->_is_gc_active = true; } ~IsGCActiveMark() { CollectedHeap* heap = Universe::heap(); assert(heap->is_gc_active(), "Sanity"); heap->_is_gc_active = false; }};#endif // SHARE_VM_GC_SHARED_ISGCACTIVEMARK_HPP